(F18) Hotel flashing

A few weeks ago I was on a girl's trip celebrating the end of school. The hotel was packed with people all our age. I woke up at about 9 one morning and everyone else was asleep. I opened up the curtains, the window faced out over a plaza with multiple other rooms. All the other windows had the curtains drawn bar one, which was directly across from us.

Through the window I could see there was a guy lying on the bed and I realised what he was doing. I didn't know if he could see me, so I took off my top and pressed my tits against the glass. There was movement and the guy got up and moved right up to the window so I could see everything. I played with my tits some more. He made some gestures and I realised what he meant. I took my pants off so I was fully nude and pressed my ass against the glass. I rubbed my ass and pussy and soon enough I watched him shoot his load all over the glass in his room. I blew him a kiss and closed the blinds and went on with my day.